At both the 10% and 5% levels of significance, is there a difference in the mean
ID: 3057781 • Letter: A
Question
At both the 10% and 5% levels of significance, is there a difference in the mean sales of the two competing camera bodies at these populations of stores? If the software allows for it, construct both 90% and 95% confidence intervals for the differences in mean sales per store in this case. Explain their meanings, and use them appropriately as you may have done in the previous problems to perform the hypothesis tests you did earlier in this problem.
Appendix One: (Sales of Camera Bodies)
Nikon D5:
131 145 150 156 176 154 138 122 130 235 165 168 221 229 154 155 154 160 154 144 240 143 232 238 130
Canon Model:
138 140 237 147 170 155 232 228 135 130 161 160 220 229 155 158 150 250 248 246 139 233 133 230 126
Explanation / Answer
At both the 10% and 5% levels of significance, is there a difference in the mean sales of the two competing camera bodies at these populations of stores? If the software allows for it, construct both 90% and 95% confidence intervals for the differences in mean sales per store in this case. Explain their meanings, and use them appropriately as you may have done in the previous problems to perform the hypothesis tests you did earlier in this problem.
Appendix One: (Sales of Camera Bodies)
Nikon D5:
131 145 150 156 176 154 138 122 130 235 165 168 221 229 154 155 154 160 154 144 240 143 232 238 130
Canon Model:
138 140 237 147 170 155 232 228 135 130 161 160 220 229 155 158 150 250 248 246 139 233 133 230 126
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